Appendectomy
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Appendectomy |
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Appendectomy on the web |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-in-Chief: Mohammed A. Sbeih, M.D.[2]
Overview
An Appendicectomy (or appendectomy) is the surgical removal of the vermiform appendix. This procedure is normally performed as an emergency procedure, when the patient is suffering from acute appendicitis. In the absence of surgical facilities, intravenous antibiotics are used to delay or avoid the onset of sepsis; it is now recognised that many cases will resolve when treated non-operatively. In some cases the appendicitis resolves completely; more often, an inflammatory mass forms around the appendix. This is a relative contraindication to surgery.
Many patients do not seek medical attention early when they have symptoms, this delays the diagnosis of appendicitis[1],and some cases could be missed. Some surgeons accepts negative appendectomies up to 15 percent of cases, so they intervene aggressively with suspicious cases. The use of imaging studies before going through the surgery reduces the rate of negative appendictomy to less than 10 percent according to some studies[2].
Anatomy and pathophysiology
The appendix is a part of small intestine, it is a small, finger-like projection located in the right lower quadrant of abdomen. It is attached to the large intestine through a small opening, which allow fluids and other materials to flow in and out of the appendix, When this opening becomes blocked, there is a buildup of secretions and fluids in the appendix. It becomes swollen and may be infected (Appendicitis), also it can ruptures, resulting in peritonitis.
An Appendectomy is done for Appendicitis. The condition can be hard to be diagnosed, especially in children, older people, and women of childbearing age, since there are some medical conditions that mimics Appendicitis in their symptoms. Most often, the first symptom is vague abdominal pain around the umbilicus. The pain may be mild at first, but it becomes sharp and severe. The pain often moves into the right lower abdomen and becomes more focused in this area.
Other symptoms include:
- Diarrhea or constipation.
- Fever (usually not very high).
- Nausea and vomiting.
- Reduced appetite.
Signs of appendicitis include:
- Guarding: Guarding occurs when a person subconsciously tenses the abdominal muscles during an examination. Voluntary guarding occurs the moment the doctor's hand touches the abdomen. Involuntary guarding occurs before the doctor actually makes contact.
- Rebound tenderness: A doctor tests for rebound tenderness by applying hand pressure to a patient's abdomen and then letting go. Pain felt upon the release of the pressure indicates rebound tenderness.
- Rovsing's sign: A doctor tests for Rovsing's sign by applying hand pressure to the lower left side of the abdomen. Pain felt on the lower right side of the abdomen upon the release of pressure on the left side indicates the presence of Rovsing's sign.
- Psoas sign: The right psoas muscle runs over the pelvis near the appendix. Flexing this muscle will cause abdominal pain if the appendix is inflamed. A doctor can check for the psoas sign by applying resistance to the right knee as the patient tries to lift the right thigh while lying down.
- Obturator sign: The right obturator muscle also runs near the appendix. A doctor tests for the obturator sign by asking the patient to lie down with the right leg bent at the knee. Moving the bent knee left and right requires flexing the obturator muscle and will cause abdominal pain if the appendix is inflamed.
- Rectal tenderness.
- Increase in white blood cells (WBC).
Women of childbearing age may be asked to undergo a pelvic exam to rule out gynecological conditions, which sometimes cause abdominal pain similar to appendicitis. If the doctors are uncertain about the diagnosis, they can perform a computed tomography (CT) scan or ultrasound to make sure the appendix is the cause of the problem. It is not known if the appendix has any function in the human body.
Treatment of Appendicitis
Most of the appendicitis cases are treated surgically and an appendectomy remains the gold standard of care. some studies showed that some patients may respond to medical therapy alone using antibiotics[3], but these patients are at risk for recurrent disease, that is why Appendectomy is the only effective treatment for appendicitis.
There are two types of operations used to remove the appendix: the traditional open procedure and a laparoscopic procedure. Laparoscopic surgery is often used if the diagnosis is in doubt, or if it is desirable to hide the scars in the umbilicus or in the pubic hair line. Recovery may be a little quicker with laparoscopic surgery; the procedure is more expensive and resource-intensive than open surgery and generally takes a little longer, with the (low in most patients) additional risks associated with pneumoperitoneum (inflating the abdomen with gas). Advanced pelvic sepsis occasionally requires a lower midline laparotomy.
Even when the surgeon finds that the appendix is not infected during the surgery, it will be removed to prevent future problems.
Indications for Appendicectomy
Appendicitis (infected appendix) must be surgically removed (emergency appendectomy) before a hole develops in the appendix (perforation) and spreads the infection to the entire abdominal space (peritonitis).
Preoperative preparation
The procedure
In general terms, the procedure for an open Appendicectomy is as follows.
Antibiotics are given immediately if there are signs of sepsis, otherwise a single dose of prophylactic intravenous antibiotics is given immediately prior to surgery.
General anaesthesia is induced, with endotracheal intubation and full muscle relaxation, and the patient is positioned supine.
The abdomen is prepared and draped and is examined under anaesthesia. If a mass is present, the incision is made over the mass; otherwise, the incision is made over McBurney's point, one third of the way from the anterior superior iliac spine (ASIS) and the umbilicus; this represents the position of the base of the appendix (the position of the tip is variable).
An inflamed appendix can be life-threatening, particularly if the patient is out of reach of medical care. Historical records show a number of appendicectomies carried out by unskilled ad hoc surgeons, communicating with a base hospital by telephone or even telegraph.
If appendicitis develops in a pregnant woman, an Appendicectomy is usually performed and should not harm the fetus.[4]
Prophylactic Appendicectomy
To find the cause of unexplained abdominal pain, exploratory surgery is sometimes performed. If the appendix is NOT the cause of symptoms, the surgeon will thoroughly check the other abdominal organs and remove the appendix anyway, to prevent it from becoming a problem in the future.
When abdominal surgery is performed for an entirely different reason (e.g. hysterectomy or bowel resection), the surgeon sometimes decides to perform an Appendicectomy in addition to the intended procedure, to eliminate the possible need of a future surgery just to remove the appendix. However, recent findings on the possible usefulness of the appendix has led to an abatement of this practice.
Recovery
Recovery time from the operation can vary from person to person. Some will take up to 3 weeks before being completely active. Others it can be a matter of days. Roy Halladay of the Toronto Blue Jays baseball team, recovered from his Appendicectomy in under 3 weeks, to return to the mound and win 3 straight games. In the case of a laparoscopic operation, the patient will have three stapled scars of about an inch in length, between the navel and pubic hair line. When a laparotomy has been performed, the patient will have a 2-4 inch scar, which will initially be heavily bruised.
Surgical outcome
Possible complications
Videos
External links
- A video of the procedure
- Another video of the procedure (Either Requires Windows Media Player and will not load in Firefox 1.5; or usethis direct link with any player that can play .wmv files.)
- Appendicectomy laparoscopic : Operation Script on Wikisurgery.
- Appendicectomy laparoscopic adult: Information for patients on Wiksiurgery.
- Appendicectomy open adult: Information for patients on Wikisurgery.
- Appendicectomy open child: Information for patients on Wikisurgery.
http://catalog.nucleusinc.com/displaymonograph.php?MID=215 http://www.uptodate.com/contents/acute-appendicitis-in-adults-management?source=search_result&selectedTitle=1~51 http://www.nlm.nih.gov/medlineplus/ency/article/002921.htm http://digestive.niddk.nih.gov/ddiseases/pubs/appendicitis/
References
- ↑ Pittman-Waller VA, Myers JG, Stewart RM, Dent DL, Page CP, Gray GA; et al. (2000). "Appendicitis: why so complicated? Analysis of 5755 consecutive appendectomies". Am Surg. 66 (6): 548–54. PMID 10888130.
- ↑ SCOAP Collaborative. Cuschieri J, Florence M, Flum DR, Jurkovich GJ, Lin P; et al. (2008). "Negative appendectomy and imaging accuracy in the Washington State Surgical Care and Outcomes Assessment Program". Ann Surg. 248 (4): 557–63. doi:10.1097/SLA.0b013e318187aeca. PMID 18936568.
- ↑ Vons C, Barry C, Maitre S, Pautrat K, Leconte M, Costaglioli B; et al. (2011). "Amoxicillin plus clavulanic acid versus appendicectomy for treatment of acute uncomplicated appendicitis: an open-label, non-inferiority, randomised controlled trial". Lancet. 377 (9777): 1573–9. doi:10.1016/S0140-6736(11)60410-8. PMID 21550483.
- ↑ Risk Factors That Develop During Pregnancy